American Express, Twitter team up on retail deals - Boston.com | Payments 2.0 | Scoop.it

Summary: American Express invents "Twitter cashback": card holders can use the Twitter online messaging service to get exclusive discounts and other deals from retailes by tweeting a Twitter hashtag, or search term, that's unique to a specific offer. After the purchase, deal savings are automatically credited to that customer's American Express card statement within one to three days.